Quickly learn to configure local and network sources of yum, and learn to use yum

---

yum Local source configuration

1、 First mount the local CD to the local directory

[[email protected] ~]# mkdir /media/cdrom
[[email protected] ~]# mount /dev/cdrom /media/cdrom 

2、 change /etc/yum.repos.d/rhe18.repo

[[email protected] ~]# vim /etc/yum.repos.d/rhel8.repo 
#[ repositories ]：  The beginning of software warehouse configuration 
#name= Specify a name 
#baseurl= The configuration is the location of the software warehouse : Packages Top level directory of 
​	 Local configuration ：file://
​	 The network configuration : http://
​			 https://
#enabled=0 perhaps 1,  be equal to 0 On behalf of not using , Default is equal to 1
#gpgcheck=0 perhaps 1, be equal to 0 It doesn't check , be equal to 1 Is to be verified 
#gpgkey= Provided key To verify ( When gpgcheck=1 When it comes into effect )
[BaseOS]
name=BaseOS
baseurl=file:///mnt/BaseOS
gpgcheck=0
[AppStream]
name=AppStream
baseurl=file:///mnt/AppStream
gpgcheck=0

[[email protected] ~]# yum clean all
[[email protected] ~]# yum makecache

yum Network source configuration

• • Alibaba cloud network source ,aliyun The mirror site of is https://mirrors.aliyun.com/

[[email protected] ~]# cat /etc/redhat-release 
Rocky Linux release 8.5 (Green Obsidian) 
 notes ： Check your release information here first , Select the appropriate warehouse . 
# Warehouse files can be written by yourself or from aliyun Web site to download  
[[email protected] ~]# cat /etc/yum.repos.d/aliyun.repo 
[appstream] 
name=appstream 
baseurl=https://mirrors.aliyun.com/rockylinux/8.5/AppStream/x86_64/os/ 
gpgcheck=0 
#gpgcheck=1 # If gpgcheck by 1, You need to write the path of the secret key file  
#gpgkey=https://mirrors.aliyun.com/rockylinux/RPM-GPG-KEY-rockyofficial 
[baseos] 
name=baseos 
baseurl=https://mirrors.aliyun.com/rockylinux/8.5/BaseOS/x86_64/os/ 
gpgcheck=0 
#gpgcheck=1 
#gpgkey=https://mirrors.aliyun.com/rockylinux/RPM-GPG-KEY-rockyofficial

Tsinghua source image site is https://mirrors.tuna.tsinghua.edu.cn/

Mirror site of University of science and technology of China https://mirrors.ustc.edu.cn/

Netease open source image station http://mirrors.163.com/

install httpd Software

yum install httpd -y

see vim Which package does the command belong to

 yum provides vim

yum uninstall httpd

yum reinstall httpd

Clean cache

yum clean all

Recreate cache

yum makcahre

install postgresql Version in the module 13

yum moudle install postgresql:13 -y